WARNING

• While the Anti-lock Braking System (ABS) is a highly advanced safety feature, it cannot override the laws of physics or compensate for reckless and dangerous driving. The primary role of the ABS is to help the driver maintain steering control and vehicle stability during hard braking maneuvers on slippery surfaces. However, please be aware that stopping distances on compromised surfaces—such as ice, wet pavement, or loose gravel—will inherently be longer than on dry, paved roads, even with the ABS fully engaged. Furthermore, stopping distances may also increase on rough, gravel, or snow-covered roads, or when using tire chains. Always maintain a safe, generous following distance from the vehicle ahead of you. Ultimately, the safety of your Nissan Leaf and its occupants remains the sole responsibility of the driver.
• The effectiveness of your braking system is directly tied to the type and condition of your tires.
  • When it becomes necessary to replace your tires, always install the manufacturer-specified size and type on all four wheels to ensure the ABS functions as intended.

The Anti-lock Braking System (ABS) is engineered to modulate brake force to prevent wheel lock-up during emergency braking or while navigating low-traction surfaces. By utilizing sensors that continuously monitor the rotational speed of each wheel, the system can instantly vary hydraulic fluid pressure to ensure that no individual wheel locks or slides.

By preventing wheel lock-up, the system empowers the driver to retain critical steering control, significantly reducing the likelihood of uncontrollable swerving or spinning on slippery roads.

Using the system

In an emergency, apply firm, steady pressure to the brake pedal and hold it down. Do not attempt to "pump" the brakes, as this interferes with the system's ability to operate efficiently.

The Anti-lock Braking System will automatically manage the braking pressure to prevent wheel lock-up, allowing you to focus your attention on steering the Nissan Leaf around obstacles.

WARNING

Never pump the brake pedal during an emergency stop. Doing so will disrupt the operation of the ABS and may result in significantly increased stopping distances.

Self-test feature

The Anti-lock Braking System comprises a complex network of electronic sensors, electric pumps, hydraulic solenoids, and a dedicated computer. This controller includes a sophisticated diagnostic routine that automatically tests the integrity of the system every time you place the power switch in the READY to drive position and begin moving the vehicle at a low speed. During this brief self-test, you might hear a faint "clunk" or feel a slight pulsation through the brake pedal.

This physical feedback is a perfectly normal characteristic of the Nissan Leaf and does not indicate a malfunction. If the computer detects a fault, it will disable the ABS to prevent erratic behavior and illuminate the ABS warning light on the instrument panel. In this state, the standard hydraulic brake system remains fully functional, though without the benefit of anti-lock assistance.

If the ABS warning light illuminates during the startup self-test or while driving, it indicates a system issue that requires professional attention. We recommend that you visit a NISSAN certified LEAF dealer for a diagnostic inspection.

Normal operation

The Anti-lock Braking System is designed to activate at speeds exceeding approximately 3 to 6 mph (5 to 10 km/h), with the exact threshold depending on current road conditions.

When the ABS detects that one or more wheels are on the verge of locking up, the hydraulic actuator will rapidly apply and release pressure. This precise modulation occurs far faster than any human could manually pump the brakes.

You may feel a rhythmic pulsation in the brake pedal and hear mechanical noises originating from under the hood; these sensations are normal and verify that the system is working effectively. However, if you feel this pulsation frequently, it serves as a valuable warning that you are driving on hazardous, low-friction road conditions and should adjust your driving style accordingly.

Brake Assist

The Nissan Leaf is also equipped with Brake Assist. This feature monitors the speed and force with which you depress the brake pedal. When the system detects a rapid or forceful input—often associated with an emergency braking event—it proactively increases the hydraulic pressure to deliver significantly greater stopping power than you could achieve with the same pedal effort on a conventional brake booster.

WARNING

Brake Assist is an auxiliary safety system designed to aid in braking maneuvers; it is not a forward collision warning or an autonomous avoidance device. It remains the driver's responsibility to stay alert, drive safely, and maintain full control of the Nissan Leaf at all times.